Energy of Wave
Trending Questions
Q. Which of the following phenomena is due to propagation of a wave?
- Vibration of a window panel when a supersonic aircraft passes
- Breaking of glasses by opera singers by singing
- Transportation of particles of a medium when a wave passes
- Both (a) and (c)
Q. A harmonic wave propagates in a medium. Find the average energy density of the wave, if at any point, the energy density becomes equal to W0 at an instant t=t0+T/6, where t0 is the instant when amplitude is maximum at this location and T is the time period of oscillation.
- 32W0
- 2W0
- 2W03
- W02
Q. A taut string for which μ=15×10−2 kg/m is under a tension of 240 N. How much power must be supplied to the string to generate sinusoidal waves at a frequency of 18.0 Hz and an amplitude of 18 cm?
- 1300 W
- 1240 W
- 1280 W
- 1220 W
Q. A sinusoidal wave on a string is described by the wave function
y=0.3sin(1.6x−100t)
where x and y are in metre and t is in second. The mass per unit length of this string is 10 g/m. Determine the power transmitted to the wave.
y=0.3sin(1.6x−100t)
where x and y are in metre and t is in second. The mass per unit length of this string is 10 g/m. Determine the power transmitted to the wave.
- 260 J
- 281 J
- 360 J
- 320 J
Q. A 400 Hz wave with amplitude 2 mm travels on a long string of linear mass density 5 g/m kept under a tension of 50 N. Find the average power and total energy associated with the wave in a 2 m long portion of the string.
- 1 W , 6 J
- 6.32 W , 0.13 J
- 6 W , 1 J
- None of the above
Q. A sinusoidal transverse wave travels on a string of length 4 m and mass 4 g. The wave speed is 20 m/s and the wavelength is 0.2 m. If the wave is to have an average power of 50 W, then
- tension induced in the string is 0.4 N.
- frequency of wave will be 100 Hz.
- linear mass density of the given string must be 10−3 kg/m.
- amplitude of the wave will be 11.25 cm
Q. Statement (A): In a small segment of string carrying a sinusoidal wave, the total energy is conserved.
Statement (B) : Every small part of the string performs SHM and in SHM, the total energy is conserved .
Statement (B) : Every small part of the string performs SHM and in SHM, the total energy is conserved .
- Both (A) and (B) are correct
- None of these
- (A) is correct only
- (B) is correct only
Q. A transverse wave of amplitude 0.5 mm and frequency 100 Hz is produced on a wire stretched to a tension of 100 N. If the wave speed is 100 m/s. What average power is the source transmitting to the wire?
- 60 mJ/s
- 49 mJ/s
- 40 mJ/s
- 70 mJ/s
Q. A sinusoidal transverse wave travels on a string of length 4 m and mass 4 g. The wave speed is 20 m/s and the wavelength is 0.2 m. If the wave is to have an average power of 50 W, then
- tension induced in the string is 0.4 N.
- frequency of wave will be 100 Hz.
- linear mass density of the given string must be 10−3 kg/m.
- amplitude of the wave will be 11.25 cm
Q. Which of the following phenomena is due to propagation of a wave?
- Vibration of a window panel when a supersonic aircraft passes
- Transportation of particles of a medium when a wave passes
- Breaking of glasses by opera singers by singing
- Both (a) and (c)